Reconsider the previous exercise on weight and haircut price.
a. Find the regression equation that predicts the haircut price based on weight.
b. Interpret the slope and intercept of the regression line.

Data from previous exercise

In a survey of statistics students at Hope College, two of the questions asked were their weight (in pounds) and the cost of their last haircut, including any hair treatments (in dollars). The data can be found in the file Weight- Haircut. Let’s explore whether or not there is evidence of a strong association between weight and cost of haircuts.